can't build modules on 2.6.28 jaunty

[Paul S]

I've been running jaunty for a couple months and been unable to build 
the alsa driver module. I also tried buiding it from alsa-project source 
package and have the same failure.  I had filed a bug against 
alsa-source, but am wondering if it's really a kernel (or kernel 
headers) bug.  Can someone suggest how to trouble shoot?

The launchpad bug link is https://bugs.launchpad.net/bugs/313481

TIA